Electron paramagnetic resonance parameters for Co²⁺doped in ZnO

Research on the optical band positions, spin-Hamiltonian parameters and atom-position parameter of Co2+ ion in CdSe crystal

“…So, the spectroscopic studies of these DMSs have drawn significant attention [6][7][8][9][10][11][12][13]. Among them, the experiments of optical and EPR spectra for Co 2 þ -doped CdSe with a wurtzite structure were done [10][11][12][13].…”

“…The studies are of significance because the Co 2 þ -doped CdSe crystal may be a good candidate for saturable absorber Q switcher used with eyesafe lasers having output near 1.54 μm [11]. It is known that in the crystal field theory, the complete diagonalization (of energy matrix) method (CDM) is capable of calculating the optical and EPR data simultaneously for d n ions in crystals [9,[14][15][16][17][18]. In the traditional crystal field theory, the CDM is based on the one-spin-orbitparameter model where only the contributions to the spectroscopic data from the spin-orbit parameter of central d n ions are taken into account [9,[14][15][16][17].…”

“…It is known that in the crystal field theory, the complete diagonalization (of energy matrix) method (CDM) is capable of calculating the optical and EPR data simultaneously for d n ions in crystals [9,[14][15][16][17][18]. In the traditional crystal field theory, the CDM is based on the one-spin-orbitparameter model where only the contributions to the spectroscopic data from the spin-orbit parameter of central d n ions are taken into account [9,[14][15][16][17]. However, for CdSe: Co 2 þ , since the spin-orbit parameter p 0 ζ ( E1659 cm À 1 [19]) of free ligand ion Se 2 À is larger than that ( p 0 ζ E 533 cm À 1 [20]) of free central ion Co 2 þ , the contributions from the spin-orbit parameter of ligand ion via covalence effect should be contained.…”